I wouldn't have a clue how to work it out - so what does it say?
I won't tell you what it says, but I'll tell you how to figure it out without beeking a geek!

Here's the code you want to crack:
54686520466c6967687420596f6b652052656c65
61736520646174652069732053657074656d6265
7220313074682c2032303035
Here's an exed-out version of the sentence from jerryjanis' post:
xxx xxxxxx xxxx xxxxxxx xxxx xx xxxxxxxxx xxxx, xxxx
It's simple substitution. The first thing I figured out was that "20" = "space" which is pretty obvious from comparing the code to the exed-out sentence.
The other bit of information you have to work with is that the message will tell you the flight yoke release date. With those 4 things, you should be able to crack the code in no time.... at least the vast majority of it and then one important specific character can be easily deduced.
Have fun!
